Question

Please give answer with explanation. I will mark it as branliest.❤
Q. If a clock strikes once at one O'clock, twice at two O'clock, thrice at 3 O'clock and so on and
again once at one O'clock and so on, then how many times will the bell be struck in the course of
2 days?
(a) 156 (b) 312 (c) 78 (d) 288
​

Answer 1

Answer:

312

Step-by-step explanation:

For every 12 hours, number of strikes per hour goes like:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Therefore total strikes in 12 hrs = n(n+1)/2 = 12*13/2 = 78

Total strikes in one day = 78*2 = 156  [24 hrs in a day]

Total strikes in 2 days = 156*2 = 312

Answer 2

Answer:

Step-by-step explanation:

Total strikes in one day = 78*2 = 156  [24 hrs in a day]

Total strikes in 2 days = 156*2 = 312